Bot Sentry is a Pidgin (libpurple) plugin to prevent Instant Message (IM) spam. It allows you to ignore IMs unless the sender is in your Buddy List, the sender is in your Allow List, or the sender correctly answers a question you have predefined.

Ayttm is an instant messenger program, supporting various protocols such as MSN, Yahoo, AIM, Jabber, and more. It is the heir of the Everybuddy project, and aims to continue improving the program and addressing its shortcomings.

ReAIM is an AOL Instant Messenger Proxy for iptables-based firewalls. It allows direct connections to be made to hosts behind an address-translating firewall. MSN and Windows Messenger are also supported.

The aim of this project is to design an open standard of distributed instant messenger protocol. Therefore, everyone can host instant messenger services through simple installation of server program that we provided.

GAIM encryption plugin using GPG (PGP clone). It works transparently and smoothly. Automatically establishes secure conversations with other enabled users, passes keys (if enabled) and eventually will allow you to specify your own keys to use.

PlanetaMessenger.org is a Instant Messenger with support to all well known instant messenger networks including ICQ,MSN,AIM,Yahoo! and Jabber through a powerfull plugin engine. PlanetaMessenger.org support multiples look and feels, plugins and profiles.

Proteus is a multi service instant messaging application for Mac OSX.
At the core of Proteus is this Service Controller! This controller provides a common interface for any number of applications to plug into. Each application that knows how to commun

Non-core plugins and other packages related to the TiK
Instant Messenger Client. To begin with, only two modules
are defined: tikpkgs (for packages and plugins that are add-ons)
and tiklang (for i18n language translation upgrades to the core TiK)

jasip, or Jeff's Automated Services/Information Provider, is a stand-alone bot for AOL's Instant Messenger (AIM) service. It provides many useful features not currently existing in AOL's Instant Messenger service, as well as just being fun.